# Localtools

> Free, fast online tools: calculators, text and image utilities, and device tests. No sign-up, no uploads — everything runs in your browser.

All tools run entirely in the browser: files, text and inputs are processed on the visitor's device and are never uploaded. Calculations are covered by automated tests.

## Date and time

- [Age Calculator](https://localtools.co/age-calculator): Find your exact age in years, months and days, and how long until your next birthday.
- [Date Calculator](https://localtools.co/date-calculator): Count the days between two dates, including business days, or add and subtract days from a date.
- [Time Calculator](https://localtools.co/time-calculator): Add and subtract hours and minutes, or total a weekly time card with breaks, overnight shifts and overtime.

## Math

- [Percentage Calculator](https://localtools.co/percentage-calculator): Percent of a number, what percent, percentage change, reverse percentages and stacked discounts.
- [Rule of Three Calculator](https://localtools.co/rule-of-three-calculator): Find the missing value in a proportion, with every step of the cross-multiplication shown.

## Text

- [Password Generator](https://localtools.co/password-generator): Create strong random passwords or passphrases in your browser. Nothing is sent or saved.
- [Typing Speed Test](https://localtools.co/typing-speed-test): Type random common words against the clock and see your words per minute and accuracy.
- [Word Counter](https://localtools.co/word-counter): Count words, characters, sentences and paragraphs as you type, with reading time.

## Images

- [Color Picker and Color Code Converter](https://localtools.co/color-picker): Pick a color and copy its HEX, RGB, HSL, HSV, CMYK or OKLCH code, then check text contrast.
- [HEIC to JPG Converter](https://localtools.co/heic-to-jpg): Turn iPhone HEIC photos into JPG or PNG files right in your browser, many at a time.
- [Image Compressor and Resizer](https://localtools.co/image-compressor): Shrink photos and images in bulk, resize them and convert to JPG, PNG or WebP — without uploading.
- [QR Code Generator](https://localtools.co/qr-code-generator): Make static QR codes for links, Wi-Fi, contacts and more. No sign-up, no expiry, no tracking.

## Money

- [Compound Interest Calculator](https://localtools.co/compound-interest-calculator): See how savings grow with compound interest and monthly deposits, year by year.

## School

- [GPA Calculator](https://localtools.co/gpa-calculator): Work out your semester and cumulative GPA on the 4.0 scale from letter grades and credits.

## Device tests

- [CPS Test (Clicks Per Second)](https://localtools.co/cps-test): Click as fast as you can for 1, 5 or 10 seconds and see your clicks per second.
- [Dead Pixel Test](https://localtools.co/dead-pixel-test): Fill your screen with solid colors to spot dead, stuck and hot pixels in seconds.
- [Keyboard Tester](https://localtools.co/keyboard-tester): Press each key and watch it light up on the on-screen keyboard to find dead or stuck keys.
- [Microphone Test](https://localtools.co/mic-test): See your microphone level live, switch between mics and record a short clip to hear yourself.
- [Reaction Time Test](https://localtools.co/reaction-time-test): Wait for the box to turn green, then click as fast as you can. Five tries, then your average.
- [Webcam Test](https://localtools.co/webcam-test): Preview your camera, see the real resolution and frame rate, and save a snapshot.
- [White Screen](https://localtools.co/white-screen): A plain white (or any color) screen that fills your display, with adjustable brightness.

## Fun and games

- [Random Picker](https://localtools.co/random-picker): Draw random numbers, pick winners from a list of names or split people into fair teams.
- [Spin the Wheel](https://localtools.co/spin-the-wheel): Type your options, spin the wheel and let chance pick a winner fairly.

## Other languages

- [Español](https://localtools.co/es)
- [Português](https://localtools.co/pt)
- [Français](https://localtools.co/fr)
- [Italiano](https://localtools.co/it)
- [日本語](https://localtools.co/ja)
- [한국어](https://localtools.co/ko)

## Site information

- [About](https://localtools.co/about)
- [Privacy Policy](https://localtools.co/privacy)
- [Terms of Use](https://localtools.co/terms)
- [Contact](https://localtools.co/contact)